EP3740771A1 - Elektrische schaltung zum test primärer interner signale eines asic - Google Patents
Elektrische schaltung zum test primärer interner signale eines asicInfo
- Publication number
- EP3740771A1 EP3740771A1 EP18811190.0A EP18811190A EP3740771A1 EP 3740771 A1 EP3740771 A1 EP 3740771A1 EP 18811190 A EP18811190 A EP 18811190A EP 3740771 A1 EP3740771 A1 EP 3740771A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- test
- electrical circuit
- input
- output
- gate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 176
- 238000012544 monitoring process Methods 0.000 claims abstract description 5
- 230000005540 biological transmission Effects 0.000 claims description 11
- 239000003990 capacitor Substances 0.000 claims description 4
- 230000004913 activation Effects 0.000 claims description 2
- 230000003213 activating effect Effects 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/3167—Testing of combined analog and digital circuits
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/317—Testing of digital circuits
- G01R31/31701—Arrangements for setting the Unit Under Test [UUT] in a test mode
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/317—Testing of digital circuits
- G01R31/31703—Comparison aspects, e.g. signature analysis, comparators
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/317—Testing of digital circuits
- G01R31/3172—Optimisation aspects, e.g. using functional pin as test pin, pin multiplexing
Definitions
- the present invention relates to an electrical circuit for testing primary internal signals of an ASIC, wherein only one test pin is provided, via which a selection of one or more digital signals to be observed or a selection of an analog signal is feasible.
- ASIC Application-specific integrated circuits
- SPI Serial Peripheral Interface
- JTAG Joint Test Action Group
- Test variables such as the primary power supply, the primary voltage reference and the reset signals of the primary
- Power supply - an ASIC can be restricted. If primary internal signals of an ASIC can be led out to the outside via the test interface, a careful and at times complex design is required to ensure that normal operation of the ASIC, in particular its startup, is not jeopardized by the testability of the corresponding signals. If, for example, the reset signal of the primary internal power supply can be tested, then the
- transmission gates of a distributed multiplexer could short-circuit the primary internal voltage reference to another signal under test, preventing startup, even if the wrong one
- an electrical circuit for testing primary internal signals of an ASIC wherein only one test pin is provided, via which a selection of one or more
- Such a circuit is particularly suitable for testing the aforementioned primary test quantities such as the primary power supply, the primary voltage reference and the primary power supply reset signals of an ASIC.
- the electrical circuit comprises at least one sub-circuit provided for monitoring a digital signal, comprising a resistor, an NMOS transistor and an AND gate, at the first input of which the digital signal is applied.
- the resistor between the test pin and the drain terminal of the NMOS transistor is arranged, the source terminal of the NMOS transistor is connected to ground, the gate terminal of the NMOS transistor is connected to the output of the AND gate and the second input of the AND gate is connected to the output terminal of the electrical circuit.
- the proposed circuit is in principle suitable - depending on the corresponding realization form - to test any internal digital signal and, according to a preferred embodiment, also any desired internal analog signal of an ASIC.
- a particular advantage of the circuit is that the ASIC infrastructure only has to be ready for operation insofar as only an internal voltage supply is available during the test of a digital or analog signal. In addition to this power supply and according to the
- Embodiments proposed circuits no other circuit parts of the ASIC must be ready for operation.
- the digital part of the ASIC does not have to be ready for operation, but may be in reset.
- a communication interface operated by the digital part of the ASIC is also not required.
- the communication for possible switching to a special test mode the communication for selecting one of the digital or analog signals to be observed and the metrological detection of these signals are effected via a single connection of the ASIC.
- the test pin can be regarded as a bidirectional interface, because information about it, in particular what exactly should be detected by measurement or which test mode is to be activated, is transferred into the ASIC by applying different high voltages in a suitable time sequence can be. Furthermore, the test pin can also provide information about internal signals in the form of a current flowing into them.
- the weighting of the currents is essential for a simultaneous or parallel detection of the internal digital Signals, so that a corresponding weighting of the resistors used for a function of the circuit is observed.
- Voltage value of the one selected internal analog signal Ai, ..., A m is.
- test mode is detected from the different levels of voltage at the test pin with the aid of a voltage divider and with the aid of Schmitt triggers and comparators and evaluated by a logic.
- the electrical circuit also has a connection between the test pin and ground
- the electrical circuit is further configured to observe analog signals and comprises a
- the partial circuit provided for monitoring the analog signal comprises a two D flip-flops
- a classic 1-of-m decoder is provided in a well-known construction, which is referred to in the art as a 1-out-n decoder, consisting of 2 d AND gates with each d inputs, the AND - Gates whose inputs are all connected to the inverted outputs Q 'of the D flip-flops, is provided for selecting the observation of all digital signals simultaneously.
- a first input of the respective AND gate with the non-inverted or the inverted output of a first of the D flip-flops a second input of the respective AND gate with the non-inverted or the inverted output of a second of the D Flip-flops and the output of the respective AND gate with an input for controlling the respective one
- an OR gate is further provided, the first input to the non-inverted output of the first of the at least two D flip-flops, the second input to the non-inverted output of the second of the at least two D flip-flops and whose output is connected to an input for controlling the operational amplifier.
- an AND gate is further provided for the inventive electrical circuit whose first input to the inverted output of the first of the at least two D flip-flops whose second input connected to the inverted output of the second of the at least two D flip-flops is and whose output is connected to a respective third input of the at least one AND gate, which are arranged in the provided for the observation of a digital signal subcircuit. It can thereby be achieved that the outputs of the AND gates, which are used to observe a digital signal, can be set to LOW and thus none of the digital signals can influence the current flowing into the test pin of the ASIC. So only one
- the output terminal of the electrical circuit is inverted by means of an inverter and in each case connected to a clear input of a D flip-flop.
- the electrical circuit further comprises two
- Comparators for selecting the digital or analog signals to be measured via the test pin and for activating different test modes are particularly advantageous because an electrical circuit realized in this way enables different test modes or test methods and furthermore can easily be extended to operation with a plurality of terminals, via which signals can be selected and observed in the same way.
- a reference voltage is advantageously applied to the positive input of the comparators and the negative input of the comparators is in each case connected to the test pin.
- the internal reference voltage reaches its target value or an internal power-on-reset signal changes state.
- a circuit consisting of a transistor as well as of a resistor and a capacitor is provided between the negative input of the comparators and the test pin of the electrical circuit. This allows protection of the comparator inputs from excessive voltages at their inputs as well as filtering and delaying the input signals.
- Circuit further provided a D-type flip-flop whose clock signal input is connected to the output of the Schmitt trigger and whose non-inverted output is connected to an input for controlling the respective comparator.
- the electrical circuit comprises two D flip-flops, which are provided for the provision of output signals. Output of such output signals is advantageous because they can be used in the ASIC to provide certain test conditions.
- a shift register consisting of D flip-flops can be provided for selecting the signals to be tested and for setting a test mode.
- FIG. 1 shows an embodiment of an electrical circuit for testing digital signals
- FIG. 2 shows an exemplary embodiment of an electrical circuit for testing digital and analog signals
- FIG. 3 shows an exemplary embodiment of an electrical circuit for testing digital and analog signals with the possibility of activating various test modes
- FIG. 4 shows a signal curve for the above-mentioned exemplary embodiment of an electrical circuit for testing digital and analog signals with the possibility of activating various test modes according to FIG. 3.
- the voltages are referred to ground GND terminals or networks, for example, with U TEST for the terminal TEST or U VDD for the network VDD.
- U TEST for the terminal TEST
- U VDD for the network VDD.
- I TEST for the ASIC terminal TEST
- FIG. 1 shows an exemplary embodiment of an electrical circuit for testing digital signals, which according to a first circuit implementation is suitable only for testing internal digital signals.
- the ASIC connection TEST can be used to switch to test mode when a voltage greater than the switching threshold of the Schmitt trigger SMTi is applied. This is done by a high level on the output terminal TM of the circuit connected to the output of the Schmitt trigger SMTi connected is displayed.
- the Schmitt trigger SMTi and the AND gates Xi to X n are supplied by a supply voltage U VDD , which is not shown in FIG.
- the switching thresholds of the Schmitt trigger are typically 2/3 or 1/3 of the supply voltage U VDD .
- the internal digital signals Di to D n of the ASIC determine the additional current which flows into the ASIC terminal TEST, in that the transistors Mi to M n
- FIG. 2 shows an exemplary embodiment of an electrical circuit for testing digital and analog signals, in which the circuit known from FIG. 1 has been extended by the testability of internal analog voltage signals, this being exemplified in FIG. 2 for three digital signals D 1 to D 3 and three analog signals Ai to A 3 is shown.
- the current flowing into the ASIC terminal TEST can now be additionally influenced by the voltage U AI to U A3 of one of the analog signals Ai to A 3 , by one of these signals via one of the transmission gates TG 1 to TG 3 to the positive Input of operating using the transistor M 4 as an impedance converter operational amplifier OP 1 is performed.
- the operational amplifier OP 1 controls the gate of the transistor M 4 in such a way that the
- the output of the OR gate Xs is LOW and the operational amplifier OPi is deactivated.
- the output of the operational amplifier OPi used here is then at 0 V.
- the positive input of the operational amplifier OPi could be pulled from a transistor to ground GND (not shown in Figure 2).
- the counter 00 is also the output of the AND gate X 4 is high, so that the digital signals Di to D 3, the current flowing into the ASIC terminal TEST, as described for Figure 1 can influence.
- the output of the Schmitt trigger SMT 2 changes from LOW to HIGH when its input voltage rises above the switching threshold of typically 2 / 3X U VDD . It changes from HIGH to LOW when its input voltage drops below the switching threshold of typically 1 / 3X U VDD .
- the input of the Schmitt trigger SMT 2 is connected to the ASIC test pin TEST.
- the voltage at its source connection must be above the threshold voltage U THP of a PMOS transistor above the supply voltage U VDD . This is the case in the circuit of FIG.
- the gate potential of M Q is raised, so that the source-gate voltage of M Q can not be much larger than the sum of the threshold voltage of a PMOS transistor and the forward voltage of a drain body diode.
- the exemplary embodiment according to FIG. 2 is limited to three analog signals Ai, A 2 , A 3 .
- D flip-flops and by extending the 1-out-of-m decoder in principle any number of analog signals can be observed. Accordingly, if more than three internal analog signals are to be observable, then the 1-out-of-m decoder must be extended as described above. Accordingly, in the case of more than three analog signals and more than two D flip-flops, the non-inverted outputs of the further D flip-flops must also be connected to additional inputs of the OR gate and the inverted outputs of the further D flip-flops to additional inputs of the AND gate.
- FIG. 3 shows an exemplary embodiment of an electrical circuit for testing digital and analog signals with the possibility of activating various test modes, in which the circuit shown in FIG. 2 has been correspondingly extended.
- Such a circuit makes it possible to activate various test modes via the ASIC terminal TEST in addition to the testability of internal digital and analog signals.
- the voltage U TEST at the ASIC terminal TEST would have to be carried ratiometrically to the internal supply voltage U VDD , which sometimes can not be possible because the internal Supply voltage may not be measurable via a separate ASIC connection.
- Schmitt trigger SMTi which serves to activate the test mode
- a further Schmitt trigger with a very high threshold so that a significant reduction of the internal supply voltage U VDD can not lead to this Schmitt trigger unintentionally switches at the same voltage U TEST at the ASIC terminal TEST and greatly reduced internal supply voltage U VDD .
- the use of multiple Schmitt triggers with very high thresholds is still possible, but requires from the components that are internally connected in the ASIC with the ASIC connector TEST, sometimes a very high
- Schmitt trigger SMTi for activating the test mode another Schmitt trigger SMT 2 is used with a very high threshold.
- This circuit also realizes the testability of three digital signals Di to D 3 and three analog signals Ai to A 3 .
- four different test modes can be activated.
- the output of the Schmitt trigger SMT 2 changes from LOW to HIGH when its input voltage rises above the switching threshold of typically 2/3 * U VDD . It changes from HIGH to LOW when its input voltage drops below the switching threshold of typically 1 / 3X U VDD .
- the voltage at its source connection must be above the threshold voltage U THP of a PMOS transistor above the supply voltage U VDD . This is the case in the circuit according to FIG. 3, when U is TEST ⁇ 3X (U VDD + U THP ). If U TEST is smaller, then M Q blocks and the input of the Schmitt trigger SMT 2 is pulled from R 6 to ground GND. With each voltage pulse whose amplitude is greater than 3X (U VDD + U THP ), the D flip-flop FF 3 switches its output Q from LOW to HIGH
- Comparators CMP 1 and CMP 2 activated. Using the comparators CMP 1 and CMP 2 , by varying the voltage on the ASIC test pin TEST, it is possible to select whether the digital signals Di to D 3 or one of the analog signals Ai to A 3 are to be selected via the ASIC connection TEST be metrologically detectable. On the other hand, it is possible to activate different test modes. Due to the possibility of deactivating the comparators CMP 1 and CMP 2 , the internal signals Di to D 3 or Ai to A 3 can also be tested if the operating voltage U VDD or the
- Reference voltage U VREF have not reached their target values. It is thus possible, for example via the ASIC terminal TEST, to detect from which internal supply voltage U VDD the internal reference voltage U VREF reaches its target value or an internal power-on-reset signal changes its state without the risk that one of the Comparators CMP 1 and CMP 2 could switch unintentionally.
- the activated comparators CMP 1 and CMP 2 provide HIGH levels when the voltage at their respective negative input is less than
- Reference voltage U VREF is.
- Capacitors Ci and C 2 serve as filters and delay elements.
- the transistors M 10 and Mn protect the comparator inputs from excessive voltages at their inputs by limiting them to a maximum of U VDD -U THN , where U THN is the threshold voltage of an NMOS transistor.
- U THN is the threshold voltage of an NMOS transistor.
- both the flip-flops FF 1 and FF 2 and also the flip-flops FF 4 , FF 5 and FF 6 are reset.
- the flip-flops FF 1 and FF 2 select either all digital signals simultaneously off (count 00) or one of the analog signals (count 01, 10, 11).
- the flip-flops FFs and FF 6 are provided for selecting a test mode.
- the voltage U TEST changes its value from 0 V to 5 V.
- the voltage U TEST briefly changes its value from 5V to 20V (and then back to 5V). Accordingly, the output of the Schmitt trigger SMT 2 (short-term) is HIGH and that of the D flip-flop FF 3 changes from LOW to HIGH.
- the comparators CMP 1 and CMP 2 are thus activated.
- the voltage U TEST changes its value from 5V to 2.5V.
- the voltage U TEST changes its value from 2.5V to 5V.
- CMPB_P short-time HIGH the output of AND gate X 13 is HIGH for a short time. Because the output of the D flip-flop FF 4 was set to HIGH at time 3, the output of the AND gate Xu also produces a short HIGH pulse, which increments the counter consisting of the D flip-flops FF 5 and FF 6, and thus switches from test mode 00 to test mode 01.
- the corresponding output signals MDo and MD 1 can be used in the ASIC to provide certain test conditions.
- the D flip-flop FF 5 and FF 6 existing counter, which is also shown in Figure 3 could also be a
- Shift registers are used to set a test mode, where the distinction between a 0 and a 1 could be made by short and long pulses.
- the voltage U TEST changes its value from 5V to 3.5V.
- the voltage U TEST changes its value from 3.5 V to 5 V.
- the output of the D flip-flop FF 4 was set to LOW at time 4, the output of the AND gate X 10 is also a short HIGH pulse, the counter consisting of the D flip-flops FF 1 and FF 2 of 00 incremented to 01 and thus, as described correspondingly for FIG. 2, the analog signal Ai is switched via the transmission gate TGi to the operational amplifier OPi, so that it can be detected by measurement via the ASIC test pin TEST.
- the voltage U TEST briefly changes its value from 5V
- the output of the Schmitt trigger SMT 2 (short-term) is HIGH and that of the D flip-flop FF 3 changes from HIGH to LOW.
- the comparators CMP 1 and CMP 2 are thus deactivated.
- the internal reference voltage U VDD could be used to measure the internal reference voltage via the ASIC connection TEST
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Tests Of Electronic Circuits (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018200723.3A DE102018200723A1 (de) | 2018-01-17 | 2018-01-17 | Elektrische Schaltung zum Test primärer interner Signale eines ASIC |
PCT/EP2018/082345 WO2019141417A1 (de) | 2018-01-17 | 2018-11-23 | Elektrische schaltung zum test primärer interner signale eines asic |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3740771A1 true EP3740771A1 (de) | 2020-11-25 |
EP3740771B1 EP3740771B1 (de) | 2022-02-09 |
Family
ID=64556871
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18811190.0A Active EP3740771B1 (de) | 2018-01-17 | 2018-11-23 | Elektrische schaltung zum test primärer interner signale eines asic |
Country Status (5)
Country | Link |
---|---|
US (1) | US11808809B2 (de) |
EP (1) | EP3740771B1 (de) |
CN (1) | CN111615635B (de) |
DE (1) | DE102018200723A1 (de) |
WO (1) | WO2019141417A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019210684A1 (de) * | 2019-07-19 | 2021-01-21 | Robert Bosch Gmbh | Vorrichtung und Verfahren zur Ansteuerung eines Testbetriebs eines ASICs |
US11022708B2 (en) | 2019-09-13 | 2021-06-01 | Sercel | Docking station for wireless seismic acquisition nodes |
US11681063B2 (en) * | 2019-09-13 | 2023-06-20 | Sercel | Multi-function acquisition device and operating method |
US11525933B2 (en) | 2019-09-13 | 2022-12-13 | Sercel | Wireless seismic acquisition node and method |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4607248A (en) * | 1983-07-25 | 1986-08-19 | Analogic Corporation | Digital to analog converter having integrated digital and analog circuitry |
JPS62235818A (ja) * | 1986-03-27 | 1987-10-16 | シ−メンス、アクチエンゲゼルシヤフト | 集積回路 |
JPH0770572B2 (ja) * | 1988-10-13 | 1995-07-31 | 松下電器産業株式会社 | 信号試験回路 |
JP2739785B2 (ja) * | 1991-07-24 | 1998-04-15 | 日本電気株式会社 | テスト信号入力回路 |
JP3180421B2 (ja) * | 1992-03-30 | 2001-06-25 | 日本電気株式会社 | テスト回路を内蔵したアナログ・ディジタル混在マスタ |
US5570090A (en) * | 1994-05-23 | 1996-10-29 | Analog Devices, Incorporated | DAC with digitally-programmable gain and sync level generation |
JPH0921848A (ja) * | 1995-07-07 | 1997-01-21 | Nec Corp | 集積回路の内部信号の観測方式 |
JPH09127202A (ja) * | 1995-11-02 | 1997-05-16 | Sharp Corp | 集積回路およびそのテスト方法 |
US5751158A (en) * | 1995-11-07 | 1998-05-12 | Micron Technology, Inc. | Method and apparatus for selectively deriving a boosted voltage exceeding an internal voltage |
DE10064478B4 (de) * | 2000-12-22 | 2005-02-24 | Atmel Germany Gmbh | Verfahren zur Prüfung einer integrierten Schaltung und Schaltungsanordnung |
JP2002214306A (ja) * | 2001-01-15 | 2002-07-31 | Hitachi Ltd | 半導体集積回路 |
EP1335207B1 (de) * | 2002-02-11 | 2012-10-10 | Tektronix, Inc. | Verfahren und Gerät zur Signalerfassung |
DE10314616B3 (de) * | 2003-04-01 | 2004-07-01 | Infineon Technologies Ag | Integrierte Schaltung mit einer Testschaltung |
US7535279B2 (en) * | 2004-12-07 | 2009-05-19 | Analog Devices, Inc. | Versatile control pin electronics |
WO2009022305A1 (en) * | 2007-08-16 | 2009-02-19 | Nxp B.V. | An integrated circuit having an analog circuit portion and a method for testing such an integrated circuit |
DE102007061380A1 (de) * | 2007-12-19 | 2009-06-25 | Robert Bosch Gmbh | Komparatorschaltung |
DE102008043254A1 (de) * | 2008-10-29 | 2010-05-06 | Robert Bosch Gmbh | Integrierter Schaltkreis zur Spannungsüberwachung |
US8653999B1 (en) * | 2012-09-05 | 2014-02-18 | Nxp B.V. | Current steering DAC, a video adapter including a current steering DAC, and a video circuit including a current steering DAC |
CN103217640A (zh) * | 2013-03-27 | 2013-07-24 | 上海宏力半导体制造有限公司 | 芯片内部模拟信号测试条件的判定方法 |
US10103074B2 (en) * | 2015-09-15 | 2018-10-16 | Semiconductor Components Industries, Llc | Method to improve analog fault coverage using test diodes |
US9823306B2 (en) * | 2016-02-11 | 2017-11-21 | Texas Instruments Incorporated | Measuring internal signals of an integrated circuit |
US10359469B2 (en) * | 2017-12-12 | 2019-07-23 | Nxp Usa, Inc. | Non-intrusive on-chip analog test/trim/calibrate subsystem |
US10571518B1 (en) * | 2018-09-26 | 2020-02-25 | Nxp B.V. | Limited pin test interface with analog test bus |
US11585849B2 (en) * | 2019-07-02 | 2023-02-21 | Nxp Usa, Inc. | Apparatuses involving calibration of input offset voltage and signal delay of circuits and methods thereof |
-
2018
- 2018-01-17 DE DE102018200723.3A patent/DE102018200723A1/de not_active Withdrawn
- 2018-11-23 CN CN201880087005.9A patent/CN111615635B/zh active Active
- 2018-11-23 WO PCT/EP2018/082345 patent/WO2019141417A1/de unknown
- 2018-11-23 US US16/961,229 patent/US11808809B2/en active Active
- 2018-11-23 EP EP18811190.0A patent/EP3740771B1/de active Active
Also Published As
Publication number | Publication date |
---|---|
US11808809B2 (en) | 2023-11-07 |
EP3740771B1 (de) | 2022-02-09 |
DE102018200723A1 (de) | 2019-07-18 |
CN111615635B (zh) | 2023-11-28 |
WO2019141417A1 (de) | 2019-07-25 |
CN111615635A (zh) | 2020-09-01 |
US20210063483A1 (en) | 2021-03-04 |
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